Desk lamp



FIG. 1 is a front perspective view of a desk lamp showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a left side view thereof; the right side view is a mirror image of the left side view as shown.

The fluorescent tubes in broken lines as shown in FIG. 6 as well as the lamp base feet in broken lines in FIGS. 1-4 and 6-7 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a desk lamp, as shown and described. 